The ending is actually a metaphor for the futility of life itself, and that focusing too hard on the destination will prevent you from appreciating the journey. In taking the black cube to the end you are effectively undoing all of existence, first by absorbing the cube and then via creating a black hole in the small pocket of infrastructure that still remains. After creation of the black hole there is nothing left because the destination is, in fact, meaningless. In attempting to find purpose in nothingness you are falling into the exact problem the game is combatting, as you have been so focused on the destination you have not been appreciating the journey.

This is a common theme in the game itself, represented in many instances by having multiple obsolete paths that all lead to the same place. This is true in the ending where you can repeatedly choose to go left or right, or continue jumping down the holes and falling but you still end up in the same location.

Either that or it's just a puzzle game and really who cares about the ending, it's not like there was an ongoing narrative to begin with..

When you are outside the dome at the end, and you've put the black cubes into the device, everything goes white instead of black. Also in Failing Forward, you end up in a blank room, I feel like this is opposite of most games where you escape from a prison, while here you just lead yourself into one.

I don't think everything get's destroyed etc. At the credits you can jump and it makes water splashing sounds, right-clicking also makes the block pickup noise. With the splashing noises I'd say you've gotten free of wherever you were and are back in a "normal" place. It could be setting it up for a sequel. Maybe when Alex finsihes the other rooms we'll learn more.

I kinda agree with kraed.I think that the game tells us by the ending (and through some other instances around the game), that becoming too obssesed with your destination will only harm you.That's why, i think, when you get the black cube the world loses it's colors and turn into these endless corridors (guess that's a methapor to how shallow your life gonna seem to you). Eventually, you will feel that with no purpose there's just nothing left, which is why the black hole is formed in the end.

I'm under the assumption the Black Cube was the key to another world. When the player picks it up with their matter gun, they find themselves transported outside of the strange world they entered and placed the Cube within the device hidden in the black sphere to create a portal. Why it sucked up everything around them, I'm not sure. Maybe the outside of "Antichamber World" is pressurized?